The English word “god” came from German “gott” which came from Proto-Germanic “guda” which came from Proto-Indo-European “ghutos” (“ghew” - pour/libate + “tos”). Thus, etymologically speaking “god” refers to a liquid offering being poured probably onto a dead body (as in a religious ritual expressing belief in the after life /ancestor worship ). Later, when the concept of personal gods occurred, instead of calling the offerings “god”, they called the divine person who receives the offerings “god”.
Both the Greek word theos and English word god does not originally refer to a personal deity but to either a holy place or the offering itself. These things (sacred place and offerings) are both associated with the concept of personal deities. However, according to history, the most primitive religious belief is Animism ( the belief that all physical things are alive because they have spirit in them) and the belief that the soul or spirit (life force) does not die so that ancestral worship (honouring dead humans ) was the first ever religious worship in history. This explains why burial rituals were the first religious activities. The concept of personal deities came much later.
The lack of personal deities in the most ancient human societies explains why “god” in its etymology does not have the meaning of “a personal god”. “god” in its original and most ancient sense is about a holy place (burial site) or the offering (burial ritual) made to honour dead human bodies due to the belief that they are not really dead but are continually alive in their souls. This belief in immortal souls is because of the universal belief in “Animism” that every physical thing (trees, stones, human bodies, water, mountain etc.) are all alive because they all have spirits.
Summary
The English word “god” (proto-Indo-European “ghutos”) originally refers to the (liquid) offerings being poured onto the dead in burial practises. When the concept of personal deities arose, they re-use and applied the word to divine persons. “god” in the language of Babylonians originally refers to a “priest”. “god” in the language of the Akkadians, Arabic , Aramaic and Latin were all originally referring to the “sky” or “heaven”. When people started to worship celestial objects (sun, moon and stars - all are found “in the sky” or “heaven”) and began treating them as persons, they simply called them “gods” which means that the personal deities are called “gods” simply because they are recognised as persons whose dwelling place is in the sky (heaven).
